EP0171645B1 - 2h-1-benzopyran-2-on derivatives, process for their preparation and medicines containing these compounds - Google Patents

2h-1-benzopyran-2-on derivatives, process for their preparation and medicines containing these compounds Download PDF

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Publication number
EP0171645B1
EP0171645B1 EP85109016A EP85109016A EP0171645B1 EP 0171645 B1 EP0171645 B1 EP 0171645B1 EP 85109016 A EP85109016 A EP 85109016A EP 85109016 A EP85109016 A EP 85109016A EP 0171645 B1 EP0171645 B1 EP 0171645B1
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Prior art keywords
methyl
benzopyran
chlorophenyl
alkyl
substituted
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German (de)
French (fr)
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EP0171645A1 (en
Inventor
Ernst-Christian Dr. Rer. Nat. Witte
Peter Dr. Rer. Nat. Neubert
Androniki Dr. Med. Roesch
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Roche Diagnostics GmbH
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Roche Diagnostics GmbH
Boehringer Mannheim GmbH
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/06—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2
    • C07D311/08—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
    • C07D311/18—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring substituted otherwise than in position 3 or 7
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/08—Antiallergic agents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/06—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2
    • C07D311/08—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
    • C07D311/16—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring substituted in position 7
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/42—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4
    • C07D311/44—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4 with one hydrogen atom in position 3
    • C07D311/54—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4 with one hydrogen atom in position 3 substituted in the carbocyclic ring

Definitions

  • Lower alkoxy substituents contain 1-6, preferably 1-4 C atoms; methoxy and ethoxy are preferred.
  • Acyloxymethyl means in particular benzoyloxy-, pivaloyloxy- and acetyloxy-methyl.
  • Acyl contains 1-6 C atoms, the groups formyl, acetyl and propionyl are preferred.
  • Halogen in all cases means fluorine, chlorine and bromine; chlorine is preferred.
  • Preferred substituents on the amino groups are methyl and ethyl.
  • Preferred alkoxycarbonyl groups are methoxy and ethoxycarbonyl.
  • the new compounds also have a strong inhibitory effect on allergic skin and bronchial reactions after oral and inhalation administration. They suppress the antigen or anti-IgE-related release of histamine and other mediators such as proteinases from different cells, e.g. B. Human leukocytes. The compounds also have antagonistic properties against mediators, in particular against histamine.
  • the compounds can also be regarded as anti-inflammatories.
  • Halogen is particularly suitable as the reactive radical X.
  • the compounds of the general formula I can also be prepared by adding a compound of the general formula VII in which R is a hydrogen atom, an easily removable protective group (such as tetrahydropyranyl, benzyl or methyl) or group VIII represents with a compound of the general formula IX in which R 6 is a carboxyl function, an ester or nitrile group or the function means condensation, optionally removing the protective group and reacting the resulting phenol according to a) or b).
  • R is a hydrogen atom
  • an easily removable protective group such as tetrahydropyranyl, benzyl or methyl
  • group VIII represents with a compound of the general formula IX in which R 6 is a carboxyl function, an ester or nitrile group or the function means condensation, optionally removing the protective group and reacting the resulting phenol according to a) or b).
  • R an electronegative group such as. B. represents the nitrile function and R 2 represents a lower alkyl group or an optionally substituted benzyl group
  • R has the meaning given above, by reaction with diazoalkanes or with phenyldiazomethane which is optionally substituted in the nucleus. It is also an alkylation or benzylation in the 4-position of the coumarin ring.
  • Examples of such changes are the reduction of a carboxyl function to the hydroxymethyl group or the oxidation of a hydroxymethyl group to the carboxyl function, but also e.g. B. the oxidation of a methyl group by means of N-haloimides to the halomethyl group.
  • the second example would be the hydrolysis of the nitrile function to carbonamide and further to carboxylic acid, or the alcoholysis of the nitrile group to the carboxylic acid ester.
  • alkylations or acylations according to 3. are the etherification of a hydroxymethyl group by alkylating agents or the formation of a carbonamide by acylation of the aminomethyl function.
  • acid-binding agents for.
  • Tertiary amines are also suitable as acid acceptors for the amine alkylation.
  • Inert solvents such as e.g. As acetone, butanone, dimethylformamide, lower alcohols, cyclic ethers such as tetrahydrofuran or dioxane are also used for the amine alkylation.
  • Both acidic and alkaline condensing agents are used for the ring closure reactions known per se.
  • an acidic condensing agent such.
  • Lewis acids such as zinc chloride.
  • basic condensing agents such.
  • condensation reactions are conveniently in a liquid reaction medium such as. B. glacial acetic acid (for acidic condensation) or in water or alcohols (for basic condensation). In individual cases, however, such condensation is also carried out by melting the reaction components together at temperatures around 220 ° C., the addition of catalytic amounts of an auxiliary such as. B. sodium acetate proves beneficial.
  • a liquid reaction medium such as. B. glacial acetic acid (for acidic condensation) or in water or alcohols (for basic condensation).
  • an auxiliary such as. B. sodium acetate proves beneficial.
  • Standard methods of organic chemistry are used for the outlined conversions of functional groups R or R 2 into other functional groups.
  • alkylable functional groups R or R 2 must first be blocked by protective groups if one wishes to carry out alkylations on the hydroxycoumarin (process a) or on the piperazine ring (process b and c). After the reaction in accordance with a, b or c, the protective group is removed again.
  • the substances I are mixed in a manner known per se with suitable pharmaceutical carrier substances, aroma, flavor and colorants and shaped for example as tablets or dragees or with the addition of appropriate auxiliaries in water or oil, such as. B. olive oil, suspended or dissolved.
  • suitable pharmaceutical carrier substances such as. B. olive oil, suspended or dissolved.
  • the substances of the general formula I can be administered orally and parenterally in liquid or solid form.
  • Water is preferably used as the injection medium, which contains the stabilizers, solubilizers and / or buffers customary for injection solutions.
  • Such additives are e.g. B.
  • tartrate or borate buffer ethanol, dimethyl sulfoxide, complexing agents (such as ethylenediaminetetraacetic acid), high molecular weight polymers (such as liquid polyethylene oxide) for viscosity control or polyethylene derivatives of sorbitan hydrides.
  • complexing agents such as ethylenediaminetetraacetic acid
  • high molecular weight polymers such as liquid polyethylene oxide for viscosity control or polyethylene derivatives of sorbitan hydrides.
  • Solid carriers are e.g. B. starch, lactose, mannitol, methyl cellulose, talc, finely divided silica, higher molecular weight polymers (such as polyethylene glycols).
  • Preparations suitable for oral administration can, if desired, contain flavorings and sweeteners.
  • the substances I according to the invention can also be used in the form of powders and ointments. You will z. B. mixed with powdered, physiologically compatible diluents or conventional ointment bases.
  • the dosage administered depends on the age, the health and the weight of the recipient, the extent of the disease, the type of further treatments which may be carried out at the same time, the frequency of the treatments and the type of effect desired.
  • the daily dose of the active compound is usually 0.1 to 50 mg / kg body weight. Usually 0.5 to 40 and preferably 1.0 to 20 mg / kg / day are effective in one or more applications per day to achieve the desired results.
  • Tetrahydrofuran allows to react for 30 min at -5 ° C and finally sucks off the precipitated triethylamine hydrochloride with exclusion of moisture.
  • the filtrate is added dropwise at + 10 ° C to a suspension of 93 mg (2.5 mmol) sodium borohydride and 1.5 ml water.
  • a variant of this process is that the acid chloride is not in liquid ammonia, but in an ice-cold mixture of dioxane and conc. Entered ammonia water and processed accordingly.
  • This variant is used to produce:
  • Tablets were produced: Each tablet contains 10 mg of the compound of Example 1
  • the tablets were made according to the following recipe:
  • the above compound was finely pulverized and mixed with lactose and starch.
  • the mixture was granulated in a conventional manner. Magnesium stearate was added to the granules and the mixture was compressed into 1,000 tablets with an individual weight of 0.12 g.

Abstract

The present invention provides 2H-1-benzopyran-2-one derivatives of the general formula: <IMAGE> (I) wherein either R1 is a lower alkyl radical, optionally substituted by phenyl, which can be substituted by lower alkyl, lower alkoxy, hydroxyl or halogen, and R2 is trifluoromethyl, cyano, hydroxymethyl, alkoxymethyl, acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, acyl, carboxyl, alkoxycarbonyl or carbamoyl, which can be mono- or disubstituted by lower alkyl; or R1 is trifluoromethyl, cyano, hydroxymethyl, alkoxymethyl, acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, acyl, carboxyl, alkoxycarbonyl or carbamoyl, which can be mono- or disubstituted by lower alkyl, and R2 is a lower alkyl radical, optionally substituted by phenyl, which can be substituted by lower alkyl, lower alkoxy, hydroxyl or halogen, and R3 is a phenyl or benzyl radical which can be substituted by lower alkyl, lower alkoxy, hydroxyl or halogen; and the pharmacologically acceptable salts thereof. The present invention also provides processes for the preparation of these 2H-1-benzopyran-2-one derivatives and pharmaceutical compositions containing them.

Description

Gegenstand der vorliegenden Erfindung sind neuartige 2H-1-Benzopyran-2-on-Derivate der allgemeinen Formel I

Figure imgb0001
in der entweder

  • R1 eine C1-C6-Alkylgruppe, die gegebenenfalls durch Phenyl substituiert ist, das durch C1-C6-Alkyl, C1-C6-Alkoxy, Hydroxy oder Halogen substituiert sein kann, und
  • R2 Trifluormethyl, Cyano, Hydroxymethyl, C1-C6-Alkoxymethyl, C1-C6-Acyloxymethyl, Halogenmethyl, Aminomethyl, Mono- oder Dialkylaminomethyl, Cl-C6-Acyl, Carboxyl, C1-C6-Alkoxycarbonyl oder Carbamoyl, das durch C,-C6-Alkyl-mono- oder disubstituiert sein kann, oder
  • R1 Trifluormethyl, Cyano, Hydroxymethyl, Alkoxymethyl, C1-C6-Acyloxymethyl, Halogenmethyl, Aminomethyl, Mono- oder Dialkylaminomethyl, C1-C6-Acyl, Carboxyl, C1-C6-Alkoxycarbonyl oder Carbamoyl, das durch C1-C6-Alkyl-mono- oder disubstituiert sein kann,
  • R2 eine C1-C6-Alkylgruppe, die gegebenenfalls durch Phenyl substituiert ist, das durch C1-C6-Alkyl, C1-C6-Alkoxy, Hydroxy oder Halogen substituiert sein kann, und
  • R3 eine Phenyl- oder Benzylgruppe, die durch C1-C6-Alkyl, C1-C6-Alkoxy, Hydroxy oder Halogen substituiert sein kann, : bedeuten, sowie deren pharmakologisch verträglichen Salze.
The present invention relates to novel 2H-1-benzopyran-2-one derivatives of the general formula I.
Figure imgb0001
 in either
  • R 1 is a C 1 -C 6 alkyl group which is optionally substituted by phenyl which can be substituted by C 1 -C 6 alkyl, C 1 -C 6 alkoxy, hydroxy or halogen, and
  • R 2 trifluoromethyl, cyano, hydroxymethyl, C 1 -C 6 alkoxymethyl, C 1 -C 6 acyloxymethyl, halomethyl, aminomethyl, mono- or dialkylaminomethyl, C 1 -C 6 acyl, carboxyl, C 1 -C 6 alkoxycarbonyl or carbamoyl, which can be mono- or disubstituted by C, -C 6 -alkyl, or
  • R 1 trifluoromethyl, cyano, hydroxymethyl, alkoxymethyl, C 1 -C 6 acyloxymethyl, halomethyl, aminomethyl, mono- or dialkylaminomethyl, C 1 -C 6 acyl, carboxyl, C 1 -C 6 alkoxycarbonyl or carbamoyl, which is represented by C Can be 1 -C 6 alkyl mono- or disubstituted,
  • R 2 is a C 1 -C 6 alkyl group which is optionally substituted by phenyl which can be substituted by C 1 -C 6 alkyl, C 1 -C 6 alkoxy, hydroxy or halogen, and
  • R 3 is a phenyl or benzyl group which may be substituted by C 1 -C 6 alkyl, C 1 -C 6 alkoxy, hydroxy or halogen: and their pharmacologically acceptable salts.

Als niedere Alkylgruppen R, oder R2 sowie als Substituenten der Phenylgruppen kommen solche mit 1-6, vorzugsweise mit 1-4 C-Atomen, insbesondere Methyl und Ethyl, in Frage.As lower alkyl groups R or R 2 and as substituents for the phenyl groups there are those with 1-6, preferably with 1-4, carbon atoms, in particular methyl and ethyl.

Niedere Alkoxy-Substituenten enthalten 1-6, vorzugsweise 1-4 C-Atome ; bevorzugt sind Methoxy und Ethoxy. Acyloxymethyl bedeutet insbesondere Benzoyloxy-, Pivaloyloxy- und Acetyloxy-methyl.Lower alkoxy substituents contain 1-6, preferably 1-4 C atoms; methoxy and ethoxy are preferred. Acyloxymethyl means in particular benzoyloxy-, pivaloyloxy- and acetyloxy-methyl.

Acyl enthält 1-6 C-Atome, bevorzugt sind die Gruppen Formyl, Aqetyl und Propionyl. Halogen bedeutet in allen Fällen Fluor, Chlor und Brom ; bevorzugt ist Chlor.Acyl contains 1-6 C atoms, the groups formyl, acetyl and propionyl are preferred. Halogen in all cases means fluorine, chlorine and bromine; chlorine is preferred.

Bevorzugte Substituenten am Aminogruppen (auch von Amiden) sind Methyl und Ethyl. Als Alkoxycarbonyl-Gruppen sind bevorzugt Methoxy- und Ethoxycarbonyl. Die neuen Verbindungen wirken auch nach oraler und inhalativer Gabe stark hemmend auf allergische Reaktionen der Haut und der Bronchien. Sie unterdruecken die Antigen- oder anti-lgE-bedingte Freisetzung von Histamin und anderen Mediatoren wie Proteinasen aus verschiedenen Zellen, z. B. Human-Leukozyten. Die Verbindungen haben darueber hinaus antagonistische Eigenschaften gegenueber Mediatoren, insbesondere gegenueber Histamin.Preferred substituents on the amino groups (including amides) are methyl and ethyl. Preferred alkoxycarbonyl groups are methoxy and ethoxycarbonyl. The new compounds also have a strong inhibitory effect on allergic skin and bronchial reactions after oral and inhalation administration. They suppress the antigen or anti-IgE-related release of histamine and other mediators such as proteinases from different cells, e.g. B. Human leukocytes. The compounds also have antagonistic properties against mediators, in particular against histamine.

Aufgrund dieser Eigenschaften koennen die Verbindungen auch als Entzuendungshemmer angesehen werden.Because of these properties, the compounds can also be regarded as anti-inflammatories.

Gegenüber den in DE-A 2123924 beschriebenen antiallergisch und antiinflammatorisch wirksamen Verbindungen, insbesondere 1-(4-Chlorphenyl)-4-[3-(4,4-dimethyl-cumarin-7-yl-oxy) propyl]-piperazin zeigen die erfindungsgemäßen Verbindungen hinsichtlich der Hemmung von Antigen induzierten Bronchospasmen in passiv sensibilisierten Meerschweinchen eine überlegene Wirkung, was nicht zu erwarten war.Compared to the anti-allergic and anti-inflammatory compounds described in DE-A 2123924, especially 1- (4-chlorophenyl) -4- [3- (4,4-dimethyl-coumarin-7-yl-oxy) propyl] piperazine show the inventive Compounds in antigen-induced bronchospasm inhibition in passively sensitized guinea pigs have a superior effect, which was not expected.

Das Verfahren zur Herstellung von Verbindungen der allgemeinen Formel I ist dadurch gekennzeichnet, daß man entweder

  • a) Verbindungen der allgemeinen Formel II
    Figure imgb0002
    in der R3 die oben angegebene Bedeutung hat und X einen reaktiven Rest darstellt, mit Verbindungen der allgemeinen Formel III
    Figure imgb0003
    in der R, und R2 die oben angegebene Bedeutung haben, in an sich bekannter Weise kondensiert, oder
  • b) Verbindungen der allgemeinen Formel IV
    Figure imgb0004
    in der R1, R2 und X die oben angegebene Bedeutung haben, mit Verbindungen der allgemeinen Formel V
    Figure imgb0005
    in der R3 die oben angegebene Bedeutung hat, in an sich bekannter Weise kondensiert, oder
  • c) fuer den Fall, daß R3 ein gegebenenfalls substituierter Benzylrest ist, Verbindungen der allgemeinen Formel VI
    Figure imgb0006
    in der R1 und R2 die oben angegebene Bedeutung haben, mit Verbindungen der Formel X-R3, in der R3 und X die oben angegebene Bedeutung haben, in an sich bekannter Weise kondensiert, worauf man die erhaltenen Produkte gewuenschtenfalls in ihre physiologisch vertraeglichen Salze ueberfuehrt.
The process for the preparation of compounds of general formula I is characterized in that either
  • a) Compounds of the general formula II
    Figure imgb0002
     in which R 3 has the meaning given above and X represents a reactive radical, with compounds of the general formula III
    Figure imgb0003
     in which R and R 2 have the meaning given above, condensed in a manner known per se, or
  • b) compounds of the general formula IV
    Figure imgb0004
     in which R 1 , R 2 and X have the meaning given above, with compounds of the general formula V
    Figure imgb0005
     in which R 3 has the meaning given above, condensed in a manner known per se, or
  • c) in the event that R 3 is an optionally substituted benzyl radical, compounds of the general formula VI
    Figure imgb0006
     in which R 1 and R 2 have the meaning given above, with compounds of the formula XR 3 , in which R 3 and X have the meaning given above, condensed in a manner known per se, whereupon the products obtained are, if desired, in their physiologically acceptable salts transferred.

Als reaktiver Rest X kommt insbesondere Halogen infrage.Halogen is particularly suitable as the reactive radical X.

Andererseits kann man die Verbindungen der allg. Formel I auch dadurch herstellen, daß man eine Verbindung der allg. Formel VII

Figure imgb0007
in welcher R ein Wasserstoffatom, eine leicht zu entfernende Schutzgruppe (wie z. B. Tetrahydropyranyl, Benzyl oder Methyl) oder aber die Gruppe VIII
Figure imgb0008
darstellt, mit einer Verbindung der allg. Formel IX
Figure imgb0009
in welcher R6 eine Carboxylfunktion, eine Ester- oder Nitrilgruppe oder die Funktion
Figure imgb0010
bedeutet, zur Kondensation bringt, gegebenenfalls die Schutzgruppe entfernt und das entstehende Phenol gemaeß a) oder b) umsetzt.On the other hand, the compounds of the general formula I can also be prepared by adding a compound of the general formula VII
Figure imgb0007
 in which R is a hydrogen atom, an easily removable protective group (such as tetrahydropyranyl, benzyl or methyl) or group VIII
Figure imgb0008
 represents with a compound of the general formula IX
Figure imgb0009
 in which R 6 is a carboxyl function, an ester or nitrile group or the function
Figure imgb0010
 means condensation, optionally removing the protective group and reacting the resulting phenol according to a) or b).

Verbindungen der allgemeinen Formel I, in denen R, eine elektronegative Gruppe wie z. B. die Nitrilfunktion darstellt und R2 eine niedere Alkylgruppe oder eine ggf. substituierte Benzylgruppe bedeutet, lassen sich aus Verbindungen der allgemeinen Formel X

Figure imgb0011
in welcher R die oben angegebene Bedeutung hat, durch Umsetzen mit Diazoalkanen oder mit ggf. im Kern substituierten Phenyldiazomethan herstellen. Es handelt sich hier älso um eine Alkylierung bzw. Benzylierung in der 4-Stellung des Cumarin-Ringes.Compounds of general formula I, in which R, an electronegative group such as. B. represents the nitrile function and R 2 represents a lower alkyl group or an optionally substituted benzyl group, can be derived from compounds of general formula X.
Figure imgb0011
 in which R has the meaning given above, by reaction with diazoalkanes or with phenyldiazomethane which is optionally substituted in the nucleus. It is also an alkylation or benzylation in the 4-position of the coumarin ring.

Verbindungen der allg. Formel I sind auch dadurch zugaenglich, daß man Veraenderungen an den Substituenten R, bzw. R2 vornimmt. Solche Veraenderungen koennen bewirkt werden

  • 1. durch Oxidations- oder Reduktionsreaktionen
  • 2. durch Hydrolyse- oder Alkoholysereaktionen
  • 3. durch Alkylierungs- oder Acylierungsreaktionen.
Compounds of the general formula I are also accessible by making changes to the substituents R or R 2 . Such changes can be brought about
  • 1. by oxidation or reduction reactions
  • 2. by hydrolysis or alcoholysis reactions
  • 3. by alkylation or acylation reactions.

Beispiele fuer solche Veraenderungen sind die Reduktion einer Carboxylfunktion zur Hydroxymethylgruppe bzw. die Oxidation einer Hydroxymethylgruppe zur Carboxylfunktion, aber auch z. B. die Oxidation einer Methylgruppe mittels N-Halogenimiden zur Halogenmethylgruppe. Zu 2. waere als Beispiel die Hydrolyse der Nitrilfunktion zum Carbonamid und weiter zur Carbonsaeure, oder auch die Alkoholyse der Nitrilgruppe zum Carbonsaeureester zu nennen.Examples of such changes are the reduction of a carboxyl function to the hydroxymethyl group or the oxidation of a hydroxymethyl group to the carboxyl function, but also e.g. B. the oxidation of a methyl group by means of N-haloimides to the halomethyl group. The second example would be the hydrolysis of the nitrile function to carbonamide and further to carboxylic acid, or the alcoholysis of the nitrile group to the carboxylic acid ester.

Als Alkylierungen bzw. Acylierungen gemaeß 3. seien beispielhaft angefuehrt die Veretherung einer Hydroxymethylgruppe durch alkylierende Agenzien oder die Bildung eines Carbonamids durch Acylierung der Aminomethylfunktion.Examples of alkylations or acylations according to 3. are the etherification of a hydroxymethyl group by alkylating agents or the formation of a carbonamide by acylation of the aminomethyl function.

Die unter a-c formulierten Reaktionen werden saemtlich nach an sich bekannten Verfahren durchgefuehrt. So wird z. B. in der US-A-3 311 636 die Umsetzung von Hydroxysalicylaldehyden und in der US-A-3 053 679 die Umsetzung von 4-Methyl-5,7-dihydroxycumarinen mit Aminoalkylhalogeniden in Gegenwart von Alkalihydroxid beschrieben.The reactions formulated under a-c are all carried out according to methods known per se. So z. B. in US-A-3 311 636 the reaction of hydroxysalicylaldehydes and in US-A-3 053 679 the reaction of 4-methyl-5,7-dihydroxycoumarins with aminoalkyl halides in the presence of alkali metal hydroxide.

Um die bei den Reaktionen a-c frei werdende Saeure HX abzufangen, wird vorzugsweise in Gegenwart von saeurebindender Agenzien, z. B. Alkali- oder Erdalkali-carbonaten, Alkali-hydrogencarbonaten, Alkali- oder Erdalkali-hydroxiden oder Alkali-alkoholaten gearbeitet. Fuer die Aminalkylierung sind auch tertiaere Amine als Saeureakzeptoren geeignet.In order to intercept the acid HX released in the reactions a-c, preferably in the presence of acid-binding agents, for. B. alkali or alkaline earth carbonates, alkali bicarbonates, alkali or alkaline earth hydroxides or alkali alcoholates. Tertiary amines are also suitable as acid acceptors for the amine alkylation.

Als Reaktionsmedium werden bevorzugt inerte Loesungsmittel wie z. B. Aceton, Butanon, Dimethylformamid, niedere Alkohole, fuer die Aminalkylierung auch zyklische Ether wie Tetrahydrofuran oder Dioxan, angewendet.Inert solvents such as e.g. As acetone, butanone, dimethylformamide, lower alcohols, cyclic ethers such as tetrahydrofuran or dioxane are also used for the amine alkylation.

Fuer die an sich bekannten Ringschlußreaktionen werden sowohl saure als auch alkalische Kondensationsmittel angewandt. Als saures Kondensationsmittel sei z. B. gasfoermiger Chlorwasserstoff (evtl. in Gegenwart von Lewis-Saeuren wie z. B. Zinkchlorid) genannt. Als basische Kondensationsmittel werden z. B. Alkali- und Erdalkali-hydroxide, Alkali-alkoholate und Alkalisalze von Carbonsaeuren eingesetzt.Both acidic and alkaline condensing agents are used for the ring closure reactions known per se. As an acidic condensing agent such. B. gaseous hydrogen chloride (possibly in the presence of Lewis acids such as zinc chloride). As basic condensing agents such. B. alkali and alkaline earth hydroxides, alkali alcoholates and alkali salts of carboxylic acids.

Die Kondensationsreaktionen werden zweckmaeßig in einem fluessigen Reaktionsmedium wie z. B. Eisessig (fuer saure Kondensationen) oder in Wasser bzw. Alkoholen (fuer basische Kondensationen) ausgefuehrt. In einzelnen Faellen werden solche Kondensationen aber auch durch Zusammenschmelzen der Reaktionskomponenten bei Temperaturen um 220 °C vorgenommen, wobei sich der Zusatz von katalytischen Mengen eines Hilfsstoffes wie z. B. Natriumacetat als foerderlich erweist.The condensation reactions are conveniently in a liquid reaction medium such as. B. glacial acetic acid (for acidic condensation) or in water or alcohols (for basic condensation). In individual cases, however, such condensation is also carried out by melting the reaction components together at temperatures around 220 ° C., the addition of catalytic amounts of an auxiliary such as. B. sodium acetate proves beneficial.

Die Alkylierung bzw. Benzylierung mit Diazoalkanen bzw. Phenyldiazomethan wurde zuerst von Clinging, Dean, Houghton und Park in Tetrahedron Letters 15 (1976), 1227-1228 beschrieben. Die Umsetzung erfolgt bei Temperaturen zwischen 0 und 20 °C in einem Gemisch aus Tetrahydrofuran und Ether.The alkylation or benzylation with diazoalkanes or phenyldiazomethane was first described by Clinging, Dean, Houghton and Park in Tetrahedron Letters 15 (1976), 1227-1228. The reaction takes place at temperatures between 0 and 20 ° C in a mixture of tetrahydrofuran and ether.

Für die skizzierten Umwandlungen funktioneller Gruppen R, bzw. R2 in andere funktionelle Gruppen werden Standardverfahren der organischen Chemie eingesetzt.Standard methods of organic chemistry are used for the outlined conversions of functional groups R or R 2 into other functional groups.

Es ist offensichtlich, daß man alkylierbare funktionelle Gruppen R, bzw. R2 zunaechst durch Schutzgruppen blockieren muß, wenn man Alkylierungen am Hydroxycumarin (Verfahren a) oder am Piperazinring (Verfahren b und c) vornehmen will. Nach erfolgter Umsetzung gemaeß a, b oder c wird die Schutzgruppe wieder entfernt.It is obvious that alkylable functional groups R or R 2 must first be blocked by protective groups if one wishes to carry out alkylations on the hydroxycoumarin (process a) or on the piperazine ring (process b and c). After the reaction in accordance with a, b or c, the protective group is removed again.

Zur Herstellung von Salzen mit pharmakologisch vertraeglichen organischen oder anorganischen Saeuren, wie z. B. Salzsaeure, Schwefelsaeure, Phosphorsaeure, Milchsaeure, Citronensaeure oder Alkylsulfonsaeure koennen die Substanzen mit den entsprechenden Saeuren umgesetzt werden.For the preparation of salts with pharmacologically acceptable organic or inorganic acids, such as. B. hydrochloric acid, sulfuric acid, phosphoric acid, lactic acid, citric acid or alkyl sulfonic acid, the substances can be reacted with the corresponding acids.

Zur Herstellung von Arzneimitteln werden die Substanzen I in an sich bekannter Weise mit geeigneten pharmazeutischen Traegersubstanzen, Aroma-, Geschmacks- und Farbstoffen gemischt und beispielsweise als Tabletten oder Dragees ausgeformt oder unter Zugabe entsprechender Hilfsstoffe in Wasser oder Oel, wie z. B. Olivenoel, suspendiert oder geloest. Die Substanzen der allgemeinen Formel I können in flüssiger oder fester Form oral und parenteral appliziert werden. Als Injektionsmedium kommt vorzugsweise Wasser zur Anwendung, welches die bei Injektionslösungen üblichen Stabilisierungsmittel, Lösungsvermittler und/oder Puffer enthält. Derartige Zusätze sind z. B. Tartrat - oder Borat-Puffer, Ethanol, Dimethylsulfoxid, Komplexbildner (wie Ethylendiamintetraessig-säure), hochmolekulare Polymere (wie flüssiges Polyethylenoxid) zur Viskositätsregelung oder Polyethylen-Derivate von Sorbitanhydriden.For the production of medicaments, the substances I are mixed in a manner known per se with suitable pharmaceutical carrier substances, aroma, flavor and colorants and shaped for example as tablets or dragees or with the addition of appropriate auxiliaries in water or oil, such as. B. olive oil, suspended or dissolved. The substances of the general formula I can be administered orally and parenterally in liquid or solid form. Water is preferably used as the injection medium, which contains the stabilizers, solubilizers and / or buffers customary for injection solutions. Such additives are e.g. B. tartrate or borate buffer, ethanol, dimethyl sulfoxide, complexing agents (such as ethylenediaminetetraacetic acid), high molecular weight polymers (such as liquid polyethylene oxide) for viscosity control or polyethylene derivatives of sorbitan hydrides.

Feste Trägerstoffe sind z. B. Stärke, Lactose, Mannit, Methylcellulose, Talkum, hochdisperse Kieselsäure, höhermolekulare Polymere (wie Polyethylenglykole).Solid carriers are e.g. B. starch, lactose, mannitol, methyl cellulose, talc, finely divided silica, higher molecular weight polymers (such as polyethylene glycols).

Für die orale Applikation geeignete Zubereitungen können gewünschtenfalls Geschmacks- und Süßstoffe enthalten. Für die äußerliche Anwendung können die erfindungsgemäßen Substanzen I auch in Form von Pudern und Salben verwendet werden. Sie werden dazu z. B. mit pulverförmigen, physiologisch verträglichen Verdünnungsmitteln bzw. üblichen Salbengrundlagen vermischt.Preparations suitable for oral administration can, if desired, contain flavorings and sweeteners. For external use, the substances I according to the invention can also be used in the form of powders and ointments. You will z. B. mixed with powdered, physiologically compatible diluents or conventional ointment bases.

Die verabreichte Dosierung hängt vom Alter, der Gesundheit und dem Gewicht des Empfängers, dem Ausmaß der Krankheit, der Art gleichzeitiger gegebenenfalls durchgeführter weiterer Behandlungen, der Häufigkeit der Behandlungen und der Art der gewünschten Wirkung ab. Üblicherweise beträgt die tägliche Dosis der aktiven Verbindung 0.1 bis 50 mg/kg Körpergewicht. Normalerweise sind 0.5 bis 40 und vorzugsweise 1.0 bis 20 mg/kg/Tag in einer oder mehreren Anwendungen pro Tag wirksam, um die gewünschten Resultate zu erhalten.The dosage administered depends on the age, the health and the weight of the recipient, the extent of the disease, the type of further treatments which may be carried out at the same time, the frequency of the treatments and the type of effect desired. The daily dose of the active compound is usually 0.1 to 50 mg / kg body weight. Usually 0.5 to 40 and preferably 1.0 to 20 mg / kg / day are effective in one or more applications per day to achieve the desired results.

In den nachfolgenden Beispielen ist das erfindungsgemaeße Verfahren naeher erlaeutert :The process according to the invention is explained in more detail in the following examples:

Bevorzugt außer den in den Beispielen genannten Verbindungen sind die folgenden :

  • 1. 3-Bromomethyl-7-<3-<4-[(4-chlorophenyl)methyl]-1-piperazinyl>propoxy-4-methyl-2H-1-benzo- pyran-2-on
  • 2. 3-Aminomethyl-7-<3-<4-[(4-chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzo- pyran-2-on
  • 3. 7-<3-<4-[(Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-diethylamino methyl-4-methyl-2H-1-benzopyran-2-on
  • 4. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-methoxymethyl-4-methyl-2H-1-ben- zopyran-2-on
  • 5. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methyl-3-trifluoromethyl-2H-1-ben- zopyran-2-on
  • 6. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-cyano-4-phenylmethyl-2H-1-benzo- pyran-2-on
  • 7. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-o n-3-carbo nsaeu re sowie deren Ethylester, Amid und Diethylamid
  • 8. 4-[(4-Chlorophenyl)methyl]-7-<3-<4-[(4-chlorophenyl)-methyl]-1-piperazinyl>propoxy>-3-cyano-2H-1-benzopyran-2-on
  • 9. 4-[(4-Chlorophenyl) methyl]-7 -<3-<4-[(4-chlorophenyl)-methyl]-1-piperazinyl>propoxy>-2H-1-benzopyran-2-on-3-carbonsaeure sowie deren Ethylester, Amid und Diethylamid
  • 10. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-phenylmethyl-2H-1-benzopyran-2- on-4-carbonsaeure sowie deren Amid.
  • 11. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-hydroxymethyl-3-phenylmethyl-2H-1-benzopyran-2-on
  • 12. 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methoxymethyl-3-phenylmethyl-2H-1-benzopyran-2-on
  • 13. 3-[(4-Chlorophenyl)methyl]-7-<3-<4-[(4-Chlorophenyl)-methyl]-1-piperazinyl>propoxy>-2H-1-benzopyran-2-on-4-carbonsaeure sowie deren Ethylester und Amid
  • 14. 3-[(4-Chlorophenyl)methyl]-7-<3-<4-[(4-chlorophenyl)-methyl]-1-piperazinyl>propoxy>-4-hydroxymethyl-2H-1-benzopyran-2-on
  • 15. 3-[(4-Chlorophenyl)methyl]-7-<3-.<4-[(4-chlorophenyl)-methyl]-1-piperazinyl>propoxy>-4-methoxymethyl-2H-1-benzopyran-2-on
In addition to the compounds mentioned in the examples, the following are preferred:
  • 1. 3-Bromomethyl-7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy-4-methyl-2H-1-benzopyran-2-one
  • 2. 3-aminomethyl-7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-2H-1-benzopyran-2-one
  • 3. 7- <3- <4 - [(chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-diethylamino methyl-4-methyl-2H-1-benzopyran-2-one
  • 4. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-methoxymethyl-4-methyl-2H-1-benzopyran-2-one
  • 5. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-3-trifluoromethyl-2H-1-benzopyran-2-one
  • 6. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-cyano-4-phenylmethyl-2H-1-benzopyran-2-one
  • 7. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-phenylmethyl-2H-1-benzopyran-2-o n-3-carboxylic acid and its ethyl ester, Amide and diethylamide
  • 8. 4 - [(4-chlorophenyl) methyl] -7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-cyano-2H-1-benzopyran-2- on
  • 9. 4 - [(4-chlorophenyl) methyl] -7 - <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -2H-1-benzopyran-2-one-3- carboxylic acid and its ethyl ester, amide and diethylamide
  • 10. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-phenylmethyl-2H-1-benzopyran-2-one-4-carboxylic acid and its amide.
  • 11. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-hydroxymethyl-3-phenylmethyl-2H-1-benzopyran-2-one
  • 12. 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methoxymethyl-3-phenylmethyl-2H-1-benzopyran-2-one
  • 13. 3 - [(4-chlorophenyl) methyl] -7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -2H-1-benzopyran-2-one-4- carboxylic acid and its ethyl ester and amide
  • 14. 3 - [(4-chlorophenyl) methyl] -7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-hydroxymethyl-2H-1-benzopyran - 2- on
  • 15. 3 - [(4-Chlorophenyl) methyl] -7- <3 -. <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methoxymethyl-2H-1-benzopyran-2 -on

Beispiel 1example 1 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-methyl-2H-1-benzopyran-2-on-4-carbonsaeure-ethyiester7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-methyl-2H-1-benzopyran-2-one-4-carboxylic acid ethyl ester

Man haelt eine Suspension aus 10.5 g (42 mmol) 7-Hydroxy-3-methyl-2H-1-benzopyran-2-on-4-carbonsaeure-ethylester, 230 ml Butanon und 18.0 g (130 mmol) pulverisiertem, wasserfreiem Kaliumcarbonat zwei Stunden auf Rueckflußtemperatur, kuehlt ab, gibt eine Spatelspitze Kaliumiodid zu und tropft nun eine Loesung aus 100 ml Butanon und 13.3 g (46 mmol) 3-<4-[(4-Chlorophenyl)methyl]-1-piperazi- nyl>propylchlorid zu. Anschließend wird 16 Stunden auf Rueckflußtemperatur gehalten. Man kuehlt dann etwas, saugt noch warm ab und dampft das Filtrat ein. Der Rueckstand wird in Ether geloest, die etherische Loesung mit Aktivkohle behandelt, filtriert und wieder eingedampft. Man loest nun die Rohbase in warmen Ethanol, gibt die doppelt molare Menge Maleinsaeure zu, kuehlt, saugt das Salz ab und kristallisiert es aus Ethanol um. Ausb. 27.0 g (87 % d. Th.) Di-maleinat mit dem Schmp. 175-176 °C. Die freie Base schmilzt bei 75 °C (Ethanol).A suspension of 10.5 g (42 mmol) of 7-hydroxy-3-methyl-2H-1-benzopyran-2-one-4-carboxylic acid ethyl ester, 230 ml of butanone and 18.0 g (130 mmol) of powdered, anhydrous potassium carbo is kept nat two hours at reflux temperature, cool, add a spatula tip of potassium iodide and now drop a solution of 100 ml butanone and 13.3 g (46 mmol) of 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride too. The mixture is then kept at the reflux temperature for 16 hours. Then you cool a little, suck off while warm and evaporate the filtrate. The residue is dissolved in ether, the ethereal solution is treated with activated carbon, filtered and evaporated again. The raw base is now dissolved in warm ethanol, the double molar amount of maleic acid is added, the mixture is cooled, the salt is suctioned off and it is recrystallized from ethanol. Educ. 27.0 g (87% of theory) of di-maleinate with a melting point of 175-176 ° C. The free base melts at 75 ° C (ethanol).

In Analogie dazu wird dargestellt

  • a) 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-phenylmethyl-2H-1-benzopyran-2-c,inn-4-carbonsaeure-ethylester

aus 7-Hydroxy-3-phenylmethyl-2H-1-benzopyran-2-on-4-carbonsaeure-ethylester und 3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propylchloridAn analogy to this is shown
  • a) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-phenylmethyl-2H-1-benzopyran-2-c, inn-4-carboxylic acid ethyl ester

from 7-hydroxy-3-phenylmethyl-2H-1-benzopyran-2-one-4-carboxylic acid ethyl ester and 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride

Beispiel 2Example 2 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-methyl-2H-1-benzopyran-2-on-4-carbonsaeure7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-methyl-2H-1-benzopyran-2-one-4-carboxylic acid

Man ruehrt ein Gemisch aus 13.5 g (27 mmol) des voranstehend beschriebenen Ethylesters (in Form der freien Base), 50 ml Ethanol und 25 ml 2 N-NaOH drei Stunden bei Raumtemperatur, saeuert mit conc. HCI an und engt im Vakuum etwas ein. Dann wird abgesaugt und das Rohprodukt aus sehr verduennter Salzsaeure umkristallisiert.A mixture of 13.5 g (27 mmol) of the above-described ethyl ester (in the form of the free base), 50 ml of ethanol and 25 ml of 2N-NaOH is stirred for three hours at room temperature, acidified with conc. HCI on and constricts something in a vacuum. It is then suctioned off and the crude product is recrystallized from very dilute hydrochloric acid.

Ausb. 11.8 g (80 % d. Th.) Dihydrochlorid mit dem Schmp. 238-241 °C (Z).Educ. 11.8 g (80% of theory) of dihydrochloride with a melting point of 238-241 ° C. (Z).

Beispiel 3Example 3 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-hydroxymethyl-3-methyl-2H-1-benzopy- ran-2-on7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-hydroxymethyl-3-methyl-2H-1-benzopyran-2-one

Ein Gemisch aus 1.7 g (3 mmol) 7-<3-<4-[(4-Chlorophenyl)-methyl]-1-piperazinyl>propoxy>-3-methyl-2H-1-benzopyran-2-on-4-carbonsaeure-dihydrochlorid, 0.98 g (8.7 mmol) abs. Triethylamin und 20 ml abs. Tetrahydrofuran wird 30 min bei Raumtemperatur geruehrt. Dann kuehlt man und tropft bei einer Innentemperatur von -5 bis -10°C eine Loesung aus 0.38 g (3.5 mmol) Chlorameisensaeureethylester und 10 ml abs. Tetrahydrofuran zu, laeßt 30 min bei -5 °C reagieren und saugt schließlich unter Feuchtigkeitsausschluß das ausgefallene Triethylaminhydrochlorid ab. Das Filtrat wird bei + 10 °C zu einer Suspension aus 93 mg (2.5 mmol) Natriumborhydrid und 1.5 ml Wasser getropft.A mixture of 1.7 g (3 mmol) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-methyl-2H-1-benzopyran-2-one-4- carboxylic acid dihydrochloride, 0.98 g (8.7 mmol) abs. Triethylamine and 20 ml abs. Tetrahydrofuran is stirred for 30 min at room temperature. Then it is cooled and a solution of 0.38 g (3.5 mmol) of ethyl chloroformate and 10 ml of abs is dropped at an internal temperature of -5 to -10 ° C. Tetrahydrofuran, allows to react for 30 min at -5 ° C and finally sucks off the precipitated triethylamine hydrochloride with exclusion of moisture. The filtrate is added dropwise at + 10 ° C to a suspension of 93 mg (2.5 mmol) sodium borohydride and 1.5 ml water.

Man ruehrt nun zwei Stunden bei Raumtemperatur, dampft anschließend im Vakuum ein und versetzt den Rueckstand mit einem Gemisch aus Eis und Natriumhydrogencarbonatloesung. Dann wird mehrmals mit Essigester extrahiert, der Extrakt mit Natriumsulfat getrocknet und schließlich eingedampft. Nach Umkristallisieren aus Ethanol 0.84 g (59 % d. Th.) Base mit dem Schmp. 135 °C. Dihydrochlorid : Schmp. 241 °C (Methanol).The mixture is then stirred for two hours at room temperature, then evaporated in vacuo and the residue is mixed with a mixture of ice and sodium bicarbonate solution. Then it is extracted several times with ethyl acetate, the extract is dried with sodium sulfate and finally evaporated. After recrystallization from ethanol, 0.84 g (59% of theory) of base with a melting point of 135 ° C. Dihydrochloride: mp 241 ° C (methanol).

Beispiel 4Example 4 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-methyl-4-trifluormethyl-2H-1-benzopyran-2-on n7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-methyl-4-trifluoromethyl-2H-1-benzopyran-2-one n

  • 1. Man erhitzt ein Gemisch aus 18.1 g (87.8 mmol) 1-(2,4-Dihydroxyphenyl)-2,2,2-trifluoro-ethanon, 23.5 g (180.6 mmol) Propionsaeure-anhydrid und 6.0 g (62.5 mmol) Natriumpropionat 8 Stunden auf 190 °C, kuehlt dann ab, loest in Ethanol und versetzt mit conc. Ammoniak bis zur stark alkalischen Reaktion. Nach 30 min Stehen wird mit 2N-HCI angesaeuert und mit Methylenchlorid extrahiert. Man trocknet den Extrakt mit Natriumsulfat, dampft ein und kristallisiert den Rueckstand aus Toluol um. Ausbeute : 9.9 g (46 % d. Th.) 7-Hydroxy-3-methyl-4-trifluormethyl-2H-1-benzopyran-2-on mit dem Schmp. 161-162 °C.1. A mixture of 18.1 g (87.8 mmol) of 1- (2,4-dihydroxyphenyl) -2,2,2-trifluoroethanone, 23.5 g (180.6 mmol) of propionic anhydride and 6.0 g (62.5 mmol) of sodium propionate is heated 8 hours at 190 ° C, then cools, dissolves in ethanol and mixed with conc. Ammonia up to a strongly alkaline reaction. After standing for 30 min, it is acidified with 2N-HCl and extracted with methylene chloride. The extract is dried with sodium sulfate, evaporated and the residue is recrystallized from toluene. Yield: 9.9 g (46% of theory) of 7-hydroxy-3-methyl-4-trifluoromethyl-2H-1-benzopyran-2-one with a melting point of 161-162 ° C.
  • 2. Die Titelverbindung erhaelt man durch Umsetzen von 7-Hydroxy-3-methyl-4-trifluormethyl-2H-1-benzopyran-2-on mit 3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propylchlorid in Analogie zu Beispiel 1. Ausb. 12.4 g (54 % d. Th.) Dihydrochlorid, Schmp. 260 °C (Z).2. The title compound is obtained by reacting 7-hydroxy-3-methyl-4-trifluoromethyl-2H-1-benzopyran-2-one with 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride in analogy to example 1. educ. 12.4 g (54% of theory) dihydrochloride, mp. 260 ° C (Z).
Beispiel 5Example 5

In Analogie zu Beispiel 1 werden dargestellt :

  • Aus 7-Hydroxy-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure-ethylester und
  • a) 3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propylchlorid die Verbindung
    • 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure-ethylester
      • Ausbeute : 83 % d. Th. Dihydrochlorid
      • Schmp. : 245 °C (Z) (waeßr. Ethanol)
  • b) 3-<4-[(2-Chlorophenyl)methyl]-1-piperazinyl>propylchlorid die Verbindung
    • 7-<3-<4-[(2-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure-ethylester
  • c) und 3-(4-Phenyl-1-piperazinyl)propylchlorid die Verbindung
    • 4-Methyl-7-<3-[4-phenyl-1-piperazinyl]propoxy>-2H-1-benzopyran-2-on-3-carbonsaeure-ethylester
Analogously to example 1, the following are shown:
  • From 7-hydroxy-4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid ethyl ester and
  • a) 3- <4 - [(4-Chlorophenyl) methyl] -1-piperazinyl> propyl chloride the compound
    • 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid, ethyl ester
      • Yield: 83% of theory Th. Dihydrochloride
      • Mp: 245 ° C (Z) (aqueous ethanol)
  • b) 3- <4 - [(2-chlorophenyl) methyl] -1-piperazinyl> propyl chloride the compound
    • 7- <3- <4 - [(2-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid, ethyl ester
  • c) and 3- (4-phenyl-1-piperazinyl) propyl chloride the compound
    • 4-Methyl-7- <3- [4-phenyl-1-piperazinyl] propoxy> -2H-1-benzopyran-2-one-3-carboxylic acid, ethyl ester

Beispiel 6Example 6

In Analogie zu Beispiel 1 wird dargestellt :

  • 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-3-cyano-4-methyl-2H-1-benzopyran-2-on
In analogy to example 1 it is shown:
  • 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-cyano-4-methyl-2H-1-benzopyran-2-one

Durch Umsetzen von 3-Cyano-7-hydroxy-4-methyl-2H-1-benzopyran-2-on mit 3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propylchlorid.By reacting 3-cyano-7-hydroxy-4-methyl-2H-1-benzopyran-2-one with 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride.

Ausbeute : 61 % d. Th. Di-maleinatYield: 61% of theory Th. Di-maleinate

Schmp. : 170-171 °C (Z) (Methanol).Mp: 170-171 ° C (Z) (methanol).

Beispiel 7Example 7

Durch Hydrolyse der entsprechenden Ethylester analog Beispiel 2 werden hergestellt :

  • a) 7-<3-<4-[(4-Chlorophenyl)methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-car- bonsaeuere
    Ausb. 70 % d. Th. Dihydrochlorid-monohydrat Schmp. 252-253 °C (Z) (waeßr. Ethanol).
  • b) 7-<3-<4-[(2-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure
  • c) 4-Methyl-7-[3-(4-phenyl-1-piperazinyl) propoxy]-2H-1-benzopyran-2-on-3-carbonsaeure
  • d) 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäure. als Dihydrochlorid-monohydrat. Schmp. 243-246 °C, Ausb. 69 % d. Th.
By hydrolysis of the corresponding ethyl ester analogously to Example 2, the following are prepared:
  • a) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid
    Educ. 70% of Th. Dihydrochloride monohydrate mp 252-253 ° C (Z) (aqueous ethanol).
  • b) 7- <3- <4 - [(2-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid
  • c) 4-Methyl-7- [3- (4-phenyl-1-piperazinyl) propoxy] -2H-1-benzopyran-2-one-3-carboxylic acid
  • d) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxylic acid. as dihydrochloride monohydrate. Mp 243-246 ° C, educ. 69% of Th.

Beispiel 8Example 8 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbon- saeureamid7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carbon acid amide

  • 1. Man ruehrt ein Gemisch aus 12.0 g (22 mmol) 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazi- nyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure-dihydrochlorid, 100 ml abs. Chloroform und 36 g (0.3 mol) Thionylchlorid 4 Stunden bei 60 °C, wobei sich ein dicker Kristallbrei bildet. Nach Stehen ueber Nacht wird zur Trockne eingedampf und der Rueckstand mit abs. Ether verruehrt. Nach Absaugen und Trocknen erhaelt man 12.0 g (97 % d. Th.) 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazi- nyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeurechlorid in Form des Dihydrochlorids. Schmp. 257-259 °C.1. A mixture of 12.0 g (22 mmol) of 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-methyl-2H-1-benzopyran-2 is stirred -one-3-carboxylic acid dihydrochloride, 100 ml abs. Chloroform and 36 g (0.3 mol) thionyl chloride for 4 hours at 60 ° C, forming a thick crystal slurry. After standing overnight, evaporate to dryness and the residue with abs. Ether stirred. After suction filtration and drying, 12.0 g (97% of theory) of 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-methyl-2H-1- are obtained. benzopyran-2-one-3-carboxylic acid chloride in the form of the dihydrochloride. Mp 257-259 ° C.
  • 2. Die Titelverbindung erhaelt man durch langsames Eintragen des Saeurechlorids in fluessiges Ammoniak, Abdampfen des Ammoniaks und Aufarbeiten des Rueckstandes. Dieser wird mit verd. Ammoniakwasser behandelt. Man extrahiert mit Methylenchlorid, waescht die organische Phase mit Wasser und trocknet mit Na2S04. Dann wird das Methylenchlorid abgedampft, der Rueckstand in Ether geloest und durch Zugabe von chlorwasserstofthaltigem Ether das Dihydrochlorid ausgefaellt. Nach dem Umkristallisieren aus waeßrigem Methanol erhaelt man das reine Dihydrochlorid in 64 % Ausbeute. Schmp. 256-258 °C.2. The title compound is obtained by slowly introducing the acid chloride into liquid ammonia, evaporating the ammonia and working up the residue. This is treated with dil. Ammonia water. It is extracted with methylene chloride, the organic phase is washed with water and dried with Na 2 S0 4 . The methylene chloride is then evaporated off, the residue is dissolved in ether and the dihydrochloride is precipitated by adding ether containing hydrogen chloride. After recrystallization from aqueous methanol, the pure dihydrochloride is obtained in 64% yield. Mp 256-258 ° C.

Eine Variante dieses Verfahrens besteht darin, daß man das Saeurechlorid nicht in fluessiges Ammoniak, sondern in ein eiskaltes Gemisch aus Dioxan und konz. Ammoniakwasser eintraegt und entsprechend aufarbeitet.A variant of this process is that the acid chloride is not in liquid ammonia, but in an ice-cold mixture of dioxane and conc. Entered ammonia water and processed accordingly.

Nach dieser Variante wird hergestellt :This variant is used to produce:

a) 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-3-methyl-2H-1-benzopyran-2-on-4-car- bonsaeureamida) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-methyl-2H-1-benzopyran-2-one-4-carboxylic acid amide Beispiel 9Example 9 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-methyl-2H-1-benzopyran-2-on-3-carbonsaeure-diethylamid7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-methyl-2H-1-benzopyran-2-one-3-carboxylic acid diethylamide

Zu einer eiskalten Loesung aus 7.8 g (107 mmol) Diethylamin und 30 ml abs. Tetrahydrofuran gibt man unter Ruehren portionsweise 6.0 g (107 mmol) des nach Beispiel 8 a) erhaltenen Saeurechlorids (in Form des Dihydrochlorids) und ruehrt weitere zwei Stunden. Dann wird eingedampft, der Eindampfrueckstand in Ethanol geloest und durch Zusetzen von chlorwasserstoffhaltigem Ether das Dihydrochlorid ausgefaellt. Nach Absaugen und Umkristallisieren aus Methanol, welches einige Prozente 2 N-HCI enthaelt, resultieren 4.65 g (73 % d. Th.) Diethylamiddihydrochlorid mit dem Schmp. 227-229 °C.To an ice-cold solution of 7.8 g (107 mmol) diethylamine and 30 ml abs. Tetrahydrofuran is added in portions with stirring, 6.0 g (107 mmol) of the acid chloride obtained in Example 8 a) (in the form of the dihydrochloride) and the mixture is stirred for a further two hours. Then the mixture is evaporated, the evaporation residue is dissolved in ethanol and the dihydrochloride is precipitated by adding ether containing hydrogen chloride. After suction filtration and recrystallization from methanol, which contains a few percent of 2N-HCl, 4.65 g (73% of theory) of diethylamide dihydrochloride with a melting point of 227-229 ° C. result.

In Analogie dazu erhält man aus dem entsprechenden Säurechlorid und Diäthylamin die VerbindungAnalogously, the compound is obtained from the corresponding acid chloride and diethylamine

7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäure-diethylamid als Dihydrochlorid mit dem Schmp. 228-230 °C. Ausb. 57 % d. Th.7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxylic acid diethylamide as dihydrochloride with mp 228 -230 ° C. Educ. 57% of theory Th. Beispiel 10Example 10 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-3-hydroxymethyl-4-methyl-2H-1-benzopy- ran-2-on7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -3-hydroxymethyl-4-methyl-2H-1-benzopyran-2-one

Bei einer Temperatur von 0 bis + 5 °C traegt man unter starkem Ruehren portionsweise 5.0 g (9 mmol) des nach Beispiel 8 a) erhaltenen Saeurechlorids (in Form des Dihydrochlorids) in eine Suspension aus 5 g (130 mmol) Natriumborhydrid und 50 ml Wasser ein, wobei starke Schaumbildung auftritt. Anschließend wird eine Stunde bei 0 °C, eine weitere Stunde bei Raumtemperatur geruehrt, dann mit verd. HCI auf pH 4 gebracht. Das ausfallende, schmierige Produkt wird mit NatriumhydrogencarbonatLoesung behandelt. Man extrahiert nun mit Methylenchlorid, trocknet die organische Phase mit Natriumsulfat und dampft ein. Nach Saeulenchromatographie (Kieselgel, Methylenchlorid + Methanöl 19 + 1 Vol.) erhaelt man 2.1 g (52% d. Th.) freie Base, deren Dihydrochlorid bei 256 °C schmilzt (aus waeßrigem Ethanol).At a temperature of 0 to + 5 ° C., 5.0 g (9 mmol) of the acid chloride obtained in Example 8 a) (in the form of the dihydrochloride) obtained in portions with vigorous stirring are carried into a suspension of 5 g (130 mmol) of sodium borohydride and 50 ml Water, with strong foaming. The mixture is then stirred for one hour at 0 ° C., for a further hour at room temperature, then brought to pH 4 with dilute HCl. The precipitated, greasy product is treated with sodium bicarbonate solution. It is then extracted with methylene chloride, the organic phase is dried with sodium sulfate and evaporated. After column chromatography (silica gel, methylene chloride + methane oil 19 + 1 vol.) 2.1 g (52% of theory) of free base are obtained, the dihydrochloride of which melts at 256 ° C. (from aqueous ethanol).

In analoger Weise werden aus den entsprechenden Saeurechloriden dargestellt :

  • a) 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-3-hydroxymethyl-4-phenylmethyl-2H-1-benzopyran-2-on und
  • b) 4-[(4-Chlor-phenyl) methyl]-7-<3-<4-[(4-chlorophenyl) methyl]-1-piperazinyl>propoxy>-3-hydroxymethyl-2H-1-benzopyran-2-on
The corresponding acid chlorides are prepared in an analogous manner:
  • a) 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-hydroxymethyl-4-phenylmethyl-2H-1-benzopyran-2-one and
  • b) 4 - [(4-chlorophenyl) methyl] -7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -3-hydroxymethyl-2H-1-benzopyran-2 -on

Beispiel 11Example 11 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäu re-ethylester7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propoxy> -4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxylic acid, ethyl ester

  • a) Ein Gemisch aus 20.0 g (63 mmol) 1-(2-Hydroxy-4-phenylmethyloxy-phenyl)-2-phenyl-ethanon, 52.8 g (0.33 mol) Methandicarbonsäure-diethylester und 6.0 g (50 mmol) Kalium-tert. butoxid wird 30 min bei 170 °C gerührt, dann kühlt man ab und löst in Toluol. Nach dem Abtrennen von Ungelöstem und Behandeln mit Kieselgel wird die Lösung eingedampft. Der kristalline Rückstand wird mit Ligroin gewaschen, dann aus Cyclohexan oder Essigester umkristallisiert. Man erhält 21.0 g (81 % d. Th.) 4-Phenylmethyl-7-phenylmethyloxy-2H-1-benzopyran-2-on-3-carbonsäure-ethylester mit dem Schmp. 117-118°C.a) A mixture of 20.0 g (63 mmol) 1- (2-hydroxy-4-phenylmethyloxy-phenyl) -2-phenylethanone, 52.8 g (0.33 mol) diethyl methanedicarboxylate and 6.0 g (50 mmol) potassium tert . Butoxide is stirred at 170 ° C. for 30 min, then the mixture is cooled and dissolved in toluene. After the undissolved matter has been separated off and treated with silica gel, the solution is evaporated. The crystalline residue is washed with ligroin, then recrystallized from cyclohexane or ethyl acetate. 21.0 g (81% of theory) of ethyl 4-phenylmethyl-7-phenylmethyloxy-2H-1-benzopyran-2-one-3-carboxylate with a melting point of 117-118 ° C.
  • b) Man löst 20.0 g (48.3 mmol) des nach a) erhaltenen Produkts in 200 ml Ethanol und 400 ml abs. Tetrahydrofuran, gibt ca. 1 g 5-proz. Palladiumkohle zu und hydriert 24 h in der Schüttelente bei Normaldruck. Nach Absaugen des Katalysators wird eingedampft, der kristalline Rückstand in heißem Essigester gelöst und Ungelöstes abgetrennt. Man versetzt nun mit Ligroin, saugt die ausfallenden Kristalle ab und kristallisiert aus Toluol um. Ausbeute 8.3 g (53 % d. Th.) 7-Hydroxy-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäure-ethylester mit dem Schmp. 150-152 °C.b) 20.0 g (48.3 mmol) of the product obtained in a) are dissolved in 200 ml of ethanol and 400 ml of abs. Tetrahydrofuran, gives about 1 g of 5 percent. Palladium carbon and hydrogenated in the shaking duck at normal pressure for 24 h. After the catalyst has been filtered off with suction, the mixture is evaporated, the crystalline residue is dissolved in hot ethyl acetate and the undissolved material is separated off. Ligroin is then added, the crystals which precipitate are filtered off and recrystallized from toluene. Yield 8.3 g (53% of theory) of 7-hydroxy-4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxylic acid ethyl ester with a melting point of 150-152 ° C.
  • c) Durch Umsetzen des nach b) erhaltenen Produktes mit 3-<4-[(4-Chlorophenyl) methyl]-1-piperazi- nyl>propylchlorid in Analogie zu Beispiel 1 erhält man in 73 % Ausbeute die Titelverbindung als Dihydrochlorid mit dem Schmp. 220-223 °C (wäßr. Ethanol).c) By reacting the product obtained according to b) with 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride in analogy to Example 1, the title compound is obtained in 73% yield as dihydrochloride with the mp 220-223 ° C (aq. Ethanol).
Beispiel 12Example 12 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyi>propoxy>-4-[(4-chlorophenyl) methyl]-2H-1-benzopy- ran-2-on-3-carbonsäure7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyi> propoxy> -4 - [(4-chlorophenyl) methyl] -2H-1-benzopyran-2-one-3-carboxylic acid

  • a) Man erhitzt ein Gemisch aus 20.0 g (76 mmol) 1-(2.4-Dihydroxyphenyl)-2-(4-chlorophenyl)-ethanon, 105.6 g (0.66 mol) Methandicarbonsäure-diethylester und 10 g (89 mmol) Kalium-tert. butoxid ca. 10 min auf ca. 210 °C, so daß überschüssiger Methandicarbonsäure-diethylester abdestilliert. Es entsteht ein tiefroter Kristallbrei. Nach Abdestillieren von restlichem Methandicarbonsäureester i. Vak. versetzt man mit verd. Salzsäure, gibt Essigester zu und rührt, bis die Kristalle gelöst sind. Die organische Phase wird nun abgetrennt, mit Na2S04 getrocknet und eingedampft. Man chromatographiert nun mittels Kieselgel/Toluol, bis alle Verunreinigungen die Säule verlassen haben und wäscht dann das gewünschte Produkt mit Ether aus der Säule aus. Nach Eindampfen und Umkristallisieren aus Ethanol erhält man 10.3 g (38 % d. Th.) 4-[(4-Chlorophenyl) methyl]-7-hydroxy-2H-1-benzopyran-2-on-3-carbonsäure-ethylester mit dem Schmp. 167-169 °C.a) A mixture of 20.0 g (76 mmol) of 1- (2,4-dihydroxyphenyl) -2- (4-chlorophenyl) -ethanone, 105.6 g (0.66 mol) of methanedicarboxylic acid diethyl ester and 10 g (89 mmol) of potassium tert is heated . butoxide for about 10 minutes to about 210 ° C, so that excess methanedicarboxylic acid diethyl ester distilled off. A deep red crystal mash is created. After distilling off the remaining methanedicarboxylic acid ester i. Vac. hydrochloric acid is added, ethyl acetate is added and the mixture is stirred until the crystals are dissolved. The organic phase is now separated off, dried with Na 2 S0 4 and evaporated. Chromatography is then carried out using silica gel / toluene until all impurities have left the column, and the desired product is then washed out of the column with ether. After evaporation and recrystallization from ethanol, 10.3 g (38% of theory) of ethyl 4 - [(4-chlorophenyl) methyl] -7-hydroxy-2H-1-benzopyran-2-one-3-carboxylate are obtained with the Mp 167-169 ° C.
  • b) Durch Umsetzen des nach a) erhaltenen Produktes mit 3-<4-[(4-Chlorophenyl) methyl]-1-piperazi- nyl>propylchlorid in Analogie zu Beispiel 1 erhält man den Ethylester der Titelverbindung als Dihydrochlorid. Ausbeute 73 % d. Th., Schmp. 228-229 °C (wäßr. Ethanol).b) By reacting the product obtained according to a) with 3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl> propyl chloride in analogy to Example 1, the ethyl ester of the title compound is obtained as dihydrochloride. Yield 73% of theory Th., Mp. 228-229 ° C (aq. Ethanol).
  • c) Die Titelverbindung erhält man durch Verseifen des nach b) erhaltenen Ethylesters mit einem Gemisch aus 2N-NaOH und Ethanol in Analogie zu Beispiel 2. Ausbeute an Dihydrochlorid : 65 % d. Th., Schmp. 245-248 °C (wäßr. Aceton).c) The title compound is obtained by saponifying the ethyl ester obtained in b) with a mixture of 2N-NaOH and ethanol in analogy to Example 2. Yield of dihydrochloride: 65% of theory. Th., Mp. 245-248 ° C (aq. Acetone).
Beispiel 13Example 13

In Analogie zu Beispiel 8, Absatz 1, erhält man aus den entsprechenden Carbonsäuren durch Umsetzen mit Thionylchlorid in Chloroform die Verbindungen

  • 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäurechlorid als Dihydrochlorid mit dem Schmp. 280-283 °C. Ausbeute 92 % d. Th.

bzw.
  • 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-[(4-chlorophenyl) methyl]-2H-1-benzopy- ran-2-on-3-carbonsäurechlorid als Dihydrochlorid mit dem Schmp. 277-282 °C. Ausbeute 97 % d. Th.
Analogously to Example 8, paragraph 1, the compounds are obtained from the corresponding carboxylic acids by reaction with thionyl chloride in chloroform
  • 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxylic acid chloride as dihydrochloride with mp 280-283 ° C. Yield 92% of theory Th.

respectively.
  • 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4 - [(4-chlorophenyl) methyl] -2H-1-benzopyran-2-one-3-carboxylic acid chloride as dihydrochloride with mp. 277-282 ° C. Yield 97% of theory Th.

Beispiel 14Example 14

In Analogie zu Beispiel 8, Variante a), wurde aus den entsprechenden Carbonsäurechloriden dargestellt :

  • 7-<3-<4-[(4-Chlorophenyl) methylj-1-piperazinyl>propoxy>-4-phenylmethyl-2H-1-benzopyran-2-on-3-carbonsäureamid als Dihydrochlorid mit dem Schmp. 185-189 °C. Das Dihydrochlorid-monohydrat schmilzt bei 169-173 °C. Ausbeute 72 % d. Th.

bzw.
  • 7-<3-<4-[(4-Chlorophenyl) methyl]-1-piperazinyl>propoxy>-4-[(4-chlorophenyl) methyl]-2H-1-benzopy- ran-2-on-3-carbonsäureamid als Dihydrochlorid mit dem Schmp. 204-207 °C (wäßr. Aceton). Ausbeute 69 % d. Th.
In analogy to Example 8, variant a), the following was prepared from the corresponding carboxylic acid chlorides:
  • 7- <3- <4 - [(4-chlorophenyl) methylj-1-piperazinyl>propoxy> -4-phenylmethyl-2H-1-benzopyran-2-one-3-carboxamide as dihydrochloride with mp. 185-189 ° C. The dihydrochloride monohydrate melts at 169-173 ° C. Yield 72% of theory Th.

respectively.
  • 7- <3- <4 - [(4-chlorophenyl) methyl] -1-piperazinyl>propoxy> -4 - [(4-chlorophenyl) methyl] -2H-1-benzopyran-2-one-3-carboxamide as dihydrochloride with the mp. 204-207 ° C (aq. Acetone). Yield 69% of theory Th.

Beispiel 15Example 15

Es wurden Tabletten hergestellt : Jede Tablette enthaelt 10 mg der Verbindung des Beispiels 1Tablets were produced: Each tablet contains 10 mg of the compound of Example 1

Die Tabletten wurden gemäß der folgenden Rezeptur hergestellt :

Figure imgb0012
The tablets were made according to the following recipe:
Figure imgb0012

Vorstehende Verbindung wurde fein pulverisiert und mit Lactose und Staerke vermischt. Das Gemisch wurde in herkoemmlicher Weise granuliert. Magnesiumstearat wurde zu dem Granulat gegeben und das Gemisch zu 1 000 Tabletten mit einem Einzelgewicht von 0.12 g verpreßt.The above compound was finely pulverized and mixed with lactose and starch. The mixture was granulated in a conventional manner. Magnesium stearate was added to the granules and the mixture was compressed into 1,000 tablets with an individual weight of 0.12 g.

Claims (6)

1. 2H-1-Benzopyran-2-one derivatives of the general formula I
Figure imgb0020
in which either
R1 signifies a C1-C6-alkyl group, which is optionally substituted by phenyl, which can be substituted by C1-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen, and
R2 signifies trifluoromethyl, cyano, hydroxymethyl, C1-C6-alkoxymethyl, C1-C6-acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, C1-C6-acyl, carboxyl, C1-C6-alkoxycarbonyl or carbamoyl, which can be mono- or di-substituted by C1-C6-alkyl ; or
R1 signifies trifluoromethyl, cyano, hydroxymethyl, alkoxymethyl, C1-C6-acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, Cl-C6-acyl, carboxyl, C1-C6-alkoxycarbonyl or carbamoyl, which can be mono- or disubstituted by C1-C6-alkyl,
R2 signifies a Cl-C6-alkyl group, which is optionally substituted by phenyl, which can be substituted by C1-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen, and
R3 signifies a phenyl or benzyl group which can be substituted by Cl-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen ; as well as their pharmacologically acceptable salts.
2. Compounds according to claim 1, in which R3 represents 4-chlorobenzyl and R1 and R2 have the given meaning.
3. Compounds according to claim 1 or 2, in which R, represents a C1-C6-alkyl group, which can be substituted by phenyl, R2 a trifluoromethyl, cyano, hydroxymethyl, C1-C6-alkoxymethyl, carboxyl or N,N'-C1-C6-dialkylcarbamoyl radical and R3 has the given meaning.
4. Process for the preparation of 2H-1-benzopyran-2-one derivatives of the general formula I
Figure imgb0021
in which either
R1 signifies a Cl-C6-alkyl group, which is optionally substituted by phenyl, which can be substituted by Cl-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen, and
R2 signifies trifluoromethyl, cyano, hydroxymethyl, Cl-C6-alkoxymethyl, C1-C6-acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, Cl-C6-acyl, carboxyl, C1-C6-alkoxycarbonyl or carbamoyl, which can be mono- or di-substituted by C1-C6-alkyl ; or
R1 signifies trifluoromethyl, cyano, hydroxymethyl, alkoxymethyl, C1-C6-acyloxymethyl, halogenomethyl, aminomethyl, mono- or dialkylaminomethyl, C1-C6-acyl, carboxyl, C1-C6-alkoxycarbonyl or carbamoyl, which can be mono- or disubstituted by Cl-C6-alkyl,
R2 signifies a C1-C6-alkyl group which is optionally substituted by phenyl, which can be substituted by C1-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen, and
R3 signifies a phenyl or benzyl group which can be substituted by C1-C6-alkyl, C1-C6-alkoxy, hydroxyl or halogen,

as well as of their pharmacologically acceptable salts, characterised in that one either
a) condenses in per se known manner compounds of the general formula II
Figure imgb0022
in which R3 has the above-given meaning and X represents a reactive residue, with compounds of the general formula III
Figure imgb0023
n which R1 and R2 have the above-given meaning, or
b) condenses in per se known manner compounds of the general formula IV
Figure imgb0024
in which R1, Rz and X have the above-given meaning, with compounds of the general formula V
Figure imgb0025
in which R3 has the above-given meaning ; or
c) for the case that R3 is an optionally substituted benzyl radical, condenses in per se known manner compounds of the general formula VI
Figure imgb0026
in which R1 and R2 have the above-given meaning, with compounds of the formula X-R3, in which R3 and X have the above-given meaning ; and subsequently, if desired, converts the compound obtained of the formula I into other compounds of the formula I by oxidation or reduction, hydrolysis, alcoholysis, alkylation or acylation, as well as optionally converts the compounds obtained into a pharmacologically acceptable salt.
5. Medicaments containing a compound according to claims 1-3, as well as usual carrier and adjuvant materials.
6. Use of compounds according to claims 1-3 for the preparation of medicaments for the treatment of allergic diseases.
EP85109016A 1984-07-28 1985-07-19 2h-1-benzopyran-2-on derivatives, process for their preparation and medicines containing these compounds Expired EP0171645B1 (en)

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US4803203A (en) * 1986-11-05 1989-02-07 Warner-Lambert Company Phenyl and heterocyclic piperazinyl alkoxy-benzheterocyclic compounds as antipsychotic agents
CA2022236A1 (en) * 1989-07-31 1991-02-01 Hiroaki Yanagisawa Coumarin derivatives, their preparation and their use in the treatment of cerebrovascular disorders
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JPS6143183A (en) 1986-03-01
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ATE38987T1 (en) 1988-12-15
EP0171645A1 (en) 1986-02-19
US4670439A (en) 1987-06-02

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